| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | n/a°F | n/a°F | n/a°F | n/a |
| February | n/a°F | n/a°F | n/a°F | n/a |
| March | n/a°F | n/a°F | n/a°F | n/a |
| April | n/a°F | n/a°F | n/a°F | n/a |
| May | n/a°F | n/a°F | n/a°F | n/a |
| June | n/a°F | n/a°F | n/a°F | n/a |
| July | n/a°F | n/a°F | n/a°F | n/a |
| August | n/a°F | n/a°F | n/a°F | n/a |
| September | n/a°F | n/a°F | n/a°F | n/a |
| October | n/a°F | n/a°F | n/a°F | n/a |
| November | n/a°F | n/a°F | n/a°F | n/a |
| December | n/a°F | n/a°F | n/a°F | n/a |
| Index | Leeds and the Thousand Islands | Ontario | National |
| Air quality index | n/a | n/a | 42 |
| Pollution index | n/a | n/a | 2,726,193 |
| Measurement | Total |
| Days measured | |
| Days with good air quality | |
| Days with moderate air quality | |
| Days w/ poor A.Q. for sensitive groups | |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | n/a% |
| Benzene | n/a% |
| Carbon Tetrachloride | n/a% |
| Lead | n/a% |
| Mercury | n/a% |
| City | Population | Air Quality Index | National Avg. |
| Redwood, NY | 483 | 35 | 30.0% |
| Clayton, NY | 1,932 | 35 | 30.0% |
| Thousand Island Park, NY | 155 | 35 | 30.0% |
| Fishers Landing, NY | 76 | 35 | 30.0% |
| Alexandria Bay, NY | 955 | 35 | 30.0% |
| City | Population | Air Quality Index | National Avg. |
| Sunbury, PA | 9,446 | 35 | 30.0% |
| Fair Oaks, GA | 9,447 | 52 | 4.0% |
| Hackettstown, NJ | 9,440 | 34 | 32.0% |
| Amityville, NY | 9,440 | 51 | 2.0% |
| Mount Airy, MD | 9,439 | 46 | 8.0% |
| Leeds and the Thousand Islands, ON | 9,445 | n/a |